The biggest clown knife I've ever seen must have been 36"...who knows what he weighed! He looked like I might be able to pick him up with both hands, his body was about 1 foot or more from his back to his belly and he was about 6" thick from side to side. There was also an oranda goldfish in this tank that was about 14" long and a huge pacu, maybe 16" or so. If B & C Aquarium Supply in Jackson, MI is still open, go in there and see if they still have those fish. They had a round 700 gallon acryilc tank in there, it was breathtaking.